Nailing machine



April 11, 1933. H, KRUSE 1,903,700

NAILING MACHINE Filed July 8, 1950 2 Sheets-Sheet L H & 4|

v Ill/15% in.

I O 2 "I 1 I? i INVENTURL Rmse April 11, 1933. H. KRUSE 1,903,700

NAILING MACHINE Filed July 8, 1950 2 Sheets-Sheet 2 Fig.4.

Patented Apr. 11, 1933 caress stares HERMANN KRUSE, OF BREMEN-SEBALDSBRUCK, GERMANY NAILING M'AOHINE Application filed July 8, 1980, Serial No. 466,548,'ai1d in Germany .T11 1y'22, 1929.

My invention relates to improvements in nailing machines, and more particularly in devices used in such machines for bending the points of the nails after hammering the same through the wood. More particularly my invention relates to machinesof the type in which a slide is provided on lts top face with grooves for bending the points of the nails and forcing the same into the wood,

said slide being moved while nailing transversely of the nail. The object of the improvements is to provide a device of this type by means of which the points or ends of the nail are bent without causingsplittmg of the wood and with this object in view gage the grooved plate at difierent points I may be regularly bent by means of the same slide, and withthis object in view my invention consists in providing the grooves of the pl ate with bendmg faces which are shghtly inclined relatively to the direction of the movement of the slide. Therefore when the point of a nail forced through the wood leaves the same it engages the said inclined face of one of the grooves of the slide, and

it is therefore uniformly bent by the pressure of the hammer acting on the nail and by reason of the small angle of the inclined.

side face of the groove.

For the purposeof explaining the invenl e tionan example embodying the same'has been shown in the accompanying drawings in which the same reference characters have beenused in all the views to indicate correspending parts. In said drawings Fig. 1 is a sectional elevation showing a part of a nailing machine and the bending device carried thereby 'Fig. 2 is atop plan view of Fig. 1 partly in section;

showing the grooved plate for bending the points of the nails,

Fig; 4 is a sectional elevation taken on the line k4 of Fig. 3, v I

Fig. 4a is a sectional elevation on an enlarged scale showing the top part of the plate shown in Figs. 8 and d and one of the grooves formed therein,

Fig. 5 is a sectional elevation on an enlarged' scale showing a board having a cleatnailed thereto,

Fig. 6 is a top plan view of Fig. 5, and; Fig. 7 is adiagrammatical sectional eleva tion showing a modification of the grooved plate and illustrating the method of bending the points of the nails."

The nailing machine provided with my improved bending device may have any known or preferred construction andin the figures I have shown only the frame 3 of the saidnailing machine and the device for bendingthe ends of the nails mounted thereon. On the said frame 3 a table 2 is mounted which is provided with a guide way 5 having an elongatedslide 1 movable therein. In the said slide 1 a plate or anvil 4: is embedded the top face of which is formed with grooves 20 disposed at an angle of relatively to. the direction of the movement of the slide 1 within the guide way 5 The slide 1 is adapted to be moved within the guide way 5 fromthe driving shaft 6 of the machine through the intermediary of a lever 8 engaged by a rotary cam 7, a link 9 jointed to said lever and to a slide rod 10, and a bell crank lever 11, 12 engaging in a transverse slot 13 of the slide 1. To the said slide two bevelled cam members 14 and 15 are secured which are engaged by rollers 16 and 1? adaptedto shift the slide transversely of the direction of the movement impartedthereto by the bell crank lever 11, 12. The move "ments thus imparted to the Slide have been indicated in Fig. 2 by the arrows 18 and 19. The shape of the gr0oves-20 and the side walls thereof is best shown in F ig; 4a.

Figs. 5 and 6 show a board 21- having a cleat 22 fixed thereto bymeans of nails23' having their ends 24E bent into the board 21.. A x

v 50' Fig. 3 is a plan view on an enlarged scale As appears fromFig. 6 the said ends 24 have been bent at an acute angle to the grain of slightly inclined relatively to the direction the wood. of the movement thereof.

In the operation of the machine the boards In testimony whereof I hereunto atfix my 22 and 21 are placed on the table 2 and the signature. E machine is started for driving nails through HERMANN KRUSE. m

the said boards. By the movement of the machine the Slide 1 carrying the anvil 4 is moved in the direction of the arrow 18 and by reason of the bevelled cam members it is simultaneously moved in the direction of the arrow 75 19, the said movements being combined into a movement directed at an angle of about 45 to the grain of the wood. Thus the grooves 4 which are likewise disposed at an angle of to the grain of the wood bend the ends of the nails at the angle shown in Fig. 6.

In Fig. 7 the anvil formed with grooves for bending the ends of the nails has received the character 41, and it is adapted to be moved in the direction of the arrow 191. The grooves 201 of the anvil are provided with walls 20 which are slightly inclined relatively to the direction of the movement of the anvil. The action of the said grooves on the points of a nail driven through the boards 221 and 211 by means of the hammer has been illus trated in the said figure by assuming the nail 231 to be movable relatively to the anvil 41 19 as has been indicated by the reference char- ()5 acters 2-81, 231 and 231, said nails being assumed to be moved in a direction opposite to the arrow191. The figure shows that by moving the nail in the said direction its end is gradually bent and driven into the wood.

While in describing the invention reference has been made to a particular example embodying the same I wish it to be understood that my invention is not limited to the construction shown in the drawings and that various changes may be made in the general arrangement of the apparatus and the construction of its parts without departing from 45 the invention, for example the anvil/1- may 1i be made integral with the slide 1.

I claim: l. The combination with a nailing machine provided with means for placing wood 5Q to be nailed thereon, of mechanisinfor bending the end of a nail driven through a board comprising an anvil adapted to engage the. ends of the nails driven through the wood and to bend the same, means for moving said 65 anvil in a direction parallel to the length of i the board, and means for slightly moving the anvil transversely of the said direction.

2. The combination with a nailing machine provided with means for placing wood there- 60 on to be nailed, of mechanism for bending the v end of y the nail driven through the wood, comprising a movable anvil adapted to engage the ends of the nails driven through. the wood and to bend the same, said anvil be- 6 ing formed with grooves having side walls 

